http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51740
Bug #: 51740 Summary: warning "is used uninitialized in this function" is missing if the variable initialized later Classification: Unclassified Product: gcc Version: 4.6.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassig...@gcc.gnu.org ReportedBy: s...@szo.hu Created attachment 26231 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26231 Code that should warn gcc fails to emit the "is used uninitialized in this function" warning, if the offending variable is initialized via a function later on. See attachment. If compiled with gcc -Wall bug.c gcc issues no warning. If line 13 is commented out, the correct bug.c:11:9: warning: ‘offender’ is used uninitialized in this function [-Wuninitialized] is emitted. I think it's not the same as #18501, because replacing line 13 with offencer = 0; still produces the warning correctly.